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Inventor:
Atsuta; Akio
Address:
Kanagawa, JP
No. of patents:
10
Patents:












Patent Number Title Of Patent Date Issued
7332708 Optical encoder February 19, 2008
In an optical encoder, a plurality of light sources is controlled on and off so as to use light rays to irradiate an optical grating of a scale from a plurality of different directions. The light rays are received by a plurality of photoreceptor elements. Operations are performed using
7122785 Rotation angle detection apparatus and resin rotary disk for the same October 17, 2006
A rotation information record surface of a rotary disk is disposed at an intermediate position between a fixing point of the rotary disk and a rotary shaft and a fixing position of a detection head, so that a stable gap can be obtained with a variation due to thermal expansion being
7087888 Electrical division circuit for an optical encoder August 8, 2006
In an optical encoder, an output signal of the encoder and a signal inverted from the output signal are respectively inputted to one input terminal and the other input terminal of a comparator constituting a circuit for electrically decomposing the output signal of the encoder, where
7045770 Sensor using roof mirror/roof prism array scale, and apparatus equipped with the sensor May 16, 2006
A divergent light beam from a light source unit having a plurality of light-emitting regions is almost contained within the surface of a reflecting body that is an array of micro roof mirrors/roof prisms disposed in a regular manner. The light beam emitted from the light source unit
7026654 Package for optical semiconductor April 11, 2006
To provide a package for an optical semiconductor having a light-emitting device and a light-receiving device in one package, in which a groove is provided between the light-emitting device and the light-receiving device to thereby avoid rays of light from the light-emitting device to di
7022974 Sensor using roof mirror/roof prism array scale, and apparatus equipped with the sensor April 4, 2006
A divergent light beam from a light source unit having a plurality of light-emitting regions is almost contained within the surface of a reflecting body that is an array of micro roof mirrors/roof prisms disposed in a regular manner. The light beam emitted from the light source unit
7019282 Optical encoder March 28, 2006
An optical encoder includes a scale having an optical grating formed thereon, a plurality of light-receiving devices, a light-emitting device, and a position-information detecting unit. The plurality of light-receiving devices is movable with respect to the scale. The light-emitting
7019281 Rotation angle detection apparatus and rotary disk for same March 28, 2006
A rotation information record surface of a rotary disk is disposed at an intermediate position between a fixing point of the rotary disk and a rotary shaft and a fixing position of a detection head, so that a stable gap can be obtained with a variation due to thermal expansion being
6975408 Reflection scale and displacement measurement apparatus using the same December 13, 2005
This invention realizes a detection system which serves as a displacement measurement apparatus for optically detecting a relative position, improves the use efficiency of a light amount, and is resistant to mechanical variations. More specifically, in an optical sensor having a ligh
6635977 Control apparatus for vibration wave actuator October 21, 2003
This invention relates to an arrangement for detecting the driven state of a vibration wave actuator apparatus and provides an apparatus in which a waveform signal having an amplitude corresponding to a vibration state is generated by a monitor circuit, and this waveform signal is level-










 
 
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